Deep well pump



May 26, `1936. Wfl-l. GRAHAM ET A1.

DEEP WELL PUMP Filea April 9, 1954 2 Sheets-Sheet 1 May 26, 1936, w. H. GRAHAM x-:T Al. 2,042,336

DEEP WELL PUMP Filed April 9, 1954 2 sheets-sheet 2 INVENTORY Patented May 26, 1.936

UNITED STATES DEEP WELL'PUMP Simplex Pump Company (no stoekhoiders liability), Santa Fe, N. Mex., a corporation of New Mexico Application April 9, v1934, :Serial-KNO. 719,730

6 Claims.

This invention relates to deep well Vpumps and more particularly to the type. disclosed in my (William H. Graham) United States Letters Patent Number y1,834,024issued December l, 193i,

wherein a rotary driving membena plunger pump and means for changing the motion of therotary driving element to reciprocatory'plunger operating motion; are readily lowerable' into,..operable Within and removable from the well' asga complete plunger pump unit.

This invention isv primarilydntended for use in deep well pumping operations, asfor instance that 'of oil Wells, wherein a. pump of the plunger type (not shown) is utilized anddriven by` rotary power means, `such as an electric motor (not shown) submerged with andas part of the pump unit.

The primary object Vof fthe invention is` to .provide an association of parts so .devised as toreliably function" within ythe transversely limited dimension of deep wellstructures.

Another object is to provide Aa means in a plunger pump of the above Acharacter Vfor changing the motion of the rotary driving element to reciprooatory plunger operating motion: thro-ugh the ,medium of clutches actuated by a .control Vrod which vin lturn is controlled by reciprocation .of ya plunger rod, iny which compression springs are employed in .effecting movementofthe control rod under accumulated 'tensioning lof .the springs, and in 'which' detent means areprovided 'for locking thesprings against action andin which the detent meansviszpositively actuated lto release the springs at definite points in Vthetravel ofithe'plungerrod.

With the above and Yother objects in view the invention subsists in the novel construction and combination of parts hereinafter described, illustrated inl the accompanying drawings, and set forth in the claims hereto appended, it being understood that various changes in form, proportion,. size and minor details ofV construction Within the scope of the .claims'may be resortedA to without departingV from thespiritor sacrificingany of the advantages ofthe. invention.

In the drawings:

fFig. 1A (sheet 1) is a view in section and elel vation ofthe upper'portion of the'mechanism:

Fig. 1B (sheet 2) isa view in section. and eleva- Fig'. 4 is a view in section and plan as seen on thezline 4 4 of Fig. 1A:

Fig. 5 is a view in` horizontal section and plan taken on the line v5--5 of Fig. 1B:

Fig. 6 is a View in horizontal section and plan as seen on the line 6 5 of Fig. 1B:

Fig. 7 is a View in vhorizontal section and plan taken onV the line 'I-'l of Fig. 1B:

Referring to the drawings: .I El indicatesasealed casing within which the working parts of the pump are operatedin a suitablelubrxicant. At 'one extremity of the casing I are double clutchmembers. A-A `and the associated parts for rdriving and utilizing the clutch power. The preferred form of the double clutch is that of the disk type conventional 'in mechanism and operation and, re'- quiring no further description.

The clutch ensemble is mountedaxiallyzconcentric inthe casingl It and surrounding-theplunger rod Il Which, in the preferred form', is'tubular and subsequently more fully described.

The clutch members A-A are respectively housed in the shroud bevel gears |12 and I3A the internal surfaces `Ill and I of the shrouds .being grooved longitudinally to receive the Vlugs of alternatexclutchxdisks inthe usual .,manner. .The shroud I2 of thefclutch member A is prolonged by the sleeve shaft I6 and terminates in the jaw clutch Il.

Within and Vclosely fitting itheibore Yof the casing IE)y ismountedv the cage I 8. secured against axial rotation inthe casingl 0 by suitable Ymeans as the screws i9. The cage II8 is .provided with suitable seats for mounting the outer race of the roller bearings 2l) and 2 I. The inner races of the bearings 28 serve to mount, freely rotatable therein, the sleeve shaft I6 .of the shroud bevel gear I2. In like manner the 'bearings 2l, the. inner races of which are `mounted on the sleeve extension 22 of the shrouded Lbevel gear I3, .mount this gear, andthe yclutch disks rotatedfithereby, in a freely rotatable manner. Intermeshing with the shroud gears VI2fand I3, and as mountedon'the relatively fixed bearings v23- inthe cage I8', the: bevel gears 24 eiiect a reversal of the direction of rotary motionfin .the gears. I2 and :I'3with respect of each toftheother. As will be noted the gears 24 ,occupy asymmetrically radial disposition, Figure 3, in

thirds,thusprovidingspace for the'ic'lutch actuating connectors later described.

The `.plunger rod II iscexternally threaded; the

thread being of `suitable proportions as to pitch,

lead and character, for a longitudinal distance equallingthe .desired Alength.-o'fzthefplunger rodrstroke. As illustratedthe plungerrod.Iflisfshown nearing the end of the up stroke the additional travel thereof being that required to actuate the clutch operating mechanism later described.

Surrounding the plunger rod II is positioned the sleeve nut 26, internally threaded as a counterpart of the thread 25 on the plunger rod II. The sleeve nut 26; of a length desirable to obtain the requisite working length and strength of threads to sustain the imposed loads and powei` output, is journaled freely rotatable in the bearing bores 21 and 28 formed in the sleeve extensions I6 and 22 of the shroud bevel gears I 2 and I3.

The sleeve nut 26, further acts as a sleeve shaft upon which the clutch members are mounted in a conventional manner. The disks of the clutch members A--A; as laminations alternating those secured to the shroud bevel gears I 2 and I3 as above described, are connected in the usual manner (lug and spline means 29) to the sleeve nut 26. It is apparent; that, in the neutral position of the clutch throw members, the body of the clutch journaled Von the sleeve nut 26 and the clutch disks, spline and lug mounted, on the sleeve nut and the nut itself are freely rotatable in either direction with respect to the gears I2 and I3 and their associated clutch disk members. Briefly, the sleeve nut 26 may be driven by either of the gears I2 or I3 in opposite rotary directions as effected by engagement of the respective clutch members.

The extension sleeve shaft I6 of the gear I2 is suiiicientlyprolonged to accommodate the insertion of the head 30, threaded at 3l into the end of the tubular cage I8. The head 30 is provided with the bore 32 in which the shaft I6 is freely rotatable and packed or sealed by suitable means as the felt washer 33. The compartment formed in the casing I by the cage I8, and the assembled parts described, is sealed at the bottom by the head 34 threaded at 35 into the cage I8. The head 34 is provided with the bore 36 sealed, by suitable means as the felt washer 31. The head 34 is further sealed relative to reciprocating parts of the clutch operating mechanism, later described, by suitable means as the felt pads 38.

It is apparent that the compartment, sealed as described, inclosing thegear transmission may be filled with the proper lubricant for operation of the parts.

'I'he lower end of the sleeve extension 22 of the bevel gear I3 terminates in the threaded portion 39 upon which is mounted the threaded cup bearing housing 40 having the projecting portion or skirt 4I, which passes through the bore 36 in the head 34. The downward thrust of the sleeve nut 26, effecting the heavy duty upthrust stroke of the plunger rod II, is sustained by the ball thrust bearing 42 interposed between the lower end of the sleeve nut 26 and the cup bearing housing 40. As this cup bearing housing, shrouded bevel gear and sleeve extension are constituted as a unit part, the load imposed on the ball thrust bearing 42 is in turn, transmitted to and is sustained by the roller bearings 2| mounted Vin the cage I8.

As described, alternating the clutch mechanism to engage and disengage the respective clutch members A and A causes the sleeve nut 26 to rotate in alternatingly reversed 'directions which, in turn, causes the plunger rod II, as a counterpart threaded member, to move rectilineally in the casing II) a longitudinal distance predetermined by the length of the thread on the plunger rod and the number of revolutions, in one or the other direction, of the sleeve nut. The plunger rod Il, as a non-threaded member and the clutch throw members 43 engaging the clutch slip ring 44 are prolonged to enter the compartment 45 in the casing I0, the former, to function as operating the trip-spring mechanism actuating the latter as the clutch operating means.

For the purpose of effecting durability and strength these members, the trip-spring mechanism and the clutch throw members, are provided in triplicate, but as each is a counterpart of the other a disclosure and description of one will serve for the others.

Within the casing I0 is mounted the cage 46 maintained therein against upward longitudinal movement by the spacer 41 between the head 34 of the clutch mounting cage I8 and the head 48 threaded at 49 in the cage 46. The cage 46 is maintained against longitudinal movement at the bottom of the casing I 0 by the closure member 50 threaded at I into the casing IIJ abutting the head 52 threaded at 53 in the cage 46. cage consists of an outer tube 54 substantially tting the casing I0 and an inner tube 55 sufiiciently larger than the plunger rod II to allow` free longitudinal movement of parts thereof later described. Both the outer tube 54 and inner tube 55 are slotted longitudinally with triplicate, radially symmetrical and aligned slots accommodating and guiding parts later described.

Within the cylindrical space formed by the outer and inner tubes 54 and 55 of the cage 46 are positioned the detents or fingers 56 and 51, knuckle jointed; as by means of the clip 58 carrying the knuckle pin 59 and fixed to the heads 48 and 52 by the screws 60, to extend parallel to, move and be impelled radially convergent relative to the longitudinal axis of symmetry of the structure. As a means impelling the fingers inwardly the springs 6I are provided, their base end 62 and 63 respectively encircling the rounded end 64 of the nger, and are recessed in the groove 65 which is further prolonged in the body of the finger to guide and maintain the spring in place. The resilient end 66 of the spring reacting against the inner surface `of the cage 46 forces the finger inwardly and provision of the notches 61 and the beveled ends 68 complete the fingers for purposes later described.

In the longitudinal slots 69 of the outer tube 54 of the cage 46, which register longitudinally with the like slots in the cage I8, is positioned and guided for longitudinal movement therein, the clutch throw members 43. Each of these members comprise the yoke portion 1I engaging the clutch slip ring 44, the inwardly projecting lug portion 12 and terminate, near the bottom of the cage 46, in the inwardly projecting lug 13. Itis This apparent that alternating longitudinal movement of the clutch throw members 43; predetermined as occurring in a cycle of time or distance, as instanced by the length of the plunger rod stroke desired, will cause a declutching and clutching action of the clutch members A and A in alternating sequence at definite points in the length of stroke of the plunger rod.

It is further apparent that to effect adequate longitudinal movement of the clutch throw memuntil the action of reclutching (for the reverse l stroke of the plunger rod) is accomplished.

Within the upper end of 'the cage 46, and surrounding the -inner tube 55 and constituted .freely slidable thereon by the bore 14, is positioned the upper follower B. At symmetrically radial positions on the body of the follower B, lugs 15 project upwardly and engage the radially registeringv slots 15 in the cage head 48 which serve as guides for longitudinal movement of the follower. The position of the lugs 15 is such as to radially align them with the clutch throw members 43 and as functioning to engage the lugs 12 on the respective clutch throw members. Beneath the follower B and secured thereto, as by means of the bolt clamps 11, is the compression coil spring 18 surrounding the inner tube 55. The body of the follower is provided with the ange portion 19 engaging the notch 61 in the detents 59. It is apparent that the extremities of the detent notch 61 which extend in parallel relation to each other and to the upper and lower surfaces of the flange 19 serve as positive limit stops of longitudinal movement of the follower.

Within the lower end of the cage G5 and sur rounding the inner tube 55 and constituted freely slidable thereon by the bore 8G, is positioned the lower follower B, provided with the flange i having the radial slots 82 engaging the detents 51 which serve as guides for longitudinal movement of the follower. The arcuate portions fit of the flange 8l serve to engage the lugs 13 on -the clutch throw members 43. The body of the follower B is further provided with the flange portion B engaging the notch G1 in the detents 51. As, with respect to the upper follower, the extremities of the detent notch 61 extend in parallel relation to the upper and lower surfaces of the flange 84 and serve as positive limit stops of longitudinal movement of the lower follower. The counterbore 85, pockets the lower end of the compression coil spring S surrounding the tube 55.

At a point corresponding with the one or the other extreme of the plunger stroke relative to the followers B and B' the plunger rod is provided with the sleeve coupling 81 into which the respective ends of the rod are threaded and further secured in a suitable manner'as by means of the set screws 88. The coupling is constructed to provide the spider arms 89 projecting radially, Figure 6, through the slots 90 in the tube 55. It is worthy of note, that the interaction of the coupling 81, spider arms 89 and the respective edges of the slots 99 in the fixed inner tube 55, coa-ct to prevent rotation of the plunger rod and resist the torque action resulting from the revolution, under load, of the sleeve nut 26' on the plunger rod. To the outer ends of the spider arms 89 is secured, by suitable means as the tap bolts 9|, the trip or ring cam 92 provided with the opposed beveled cam faces 93 and 94 adapted, upon sufficient longitudinal movement of the plunger rod, to act upon the respective beveled ends 68 of the detents 56 and 51 respectively and positively trip the detents by forcing them radially outward.

As described the casing I0 is sealed at its lower extremity by the head 50 threaded into the casing. The plunger rod extends through the bore 95 in this head and is sealed relative to ingress of the well contents by suitable means as the compression packing 96 in the stuffing box 91. The head 50 is externally threaded at 98 to accommodate prolongation of the casing serving to house additional elements, not shown, of the pump structure.

Operation is as follows: With relation to the several elements of the structure as illustrated,

the upper clutch member A effects the :down

threadeds-leeve nut 28 the latter being rotated in rreversed directions by alternating engagement with the respective clutch members A and A.

With the clutch member A' engaged and A disengaged, rotary motion and power in one direction applied to the jaw clutch I1, is transmitted to the bevel-gear train, as idling through clutch' A and as applied in clutch A. Thus affected, the plunger rod tends to move upward to complete the up stroke. As illustrated the plunger rod carrying the trip cam 92 is shown nearing the end of the up stroke. trip cam effects contact with the lower end of the compression coil spring 18. Upon continued movement 'of the plunger rodcompression of the spring occurs as the follower B is held against longitudinal movement, in the direction of the spring compression, by the detents 55 the upper end vof the notch S1 of which engages the upper surface of the flange 19 of the follower. Upon further continued movement of the plunger rod the trip cam 92 effects contact with the beveled ends 68 'of the detents whereupo-n a slight additional movement positively forces the detents radially outward, due to the action of `the beveled surfaces of the detent and trip cam, thus releasing the follower. Upon release of the follower the power of the compressed spring i3 impels the follower to instantly move longitudinally, engage the lug 15 with the lug .12 of the clutch throw members 43 and exert power of sufficient magnitude and instantaneous effect to declutch the driving member A and throw in the yclutch A. As the `clutch A effects the down stroke of the plunger rod it immediately begins to move downwardly. As this movement continues the trip cam is retracted free of contact with the detents which are again forced inwardly by their respective springs to their initial position. Upon still further movement of the plunger rod the compression spring assumes the form of its free length and, as retraction continues, lowers the follower to rest upon and be retained in its initial position by engagement with the lower end of the notch 61 in the detents.

The down stroke of the plunger rod in like manner effects a reversed movement of the clutch throw members as the follower B is impelled downwardly, by the detent released compression spring 86, to make contact with the lug 13 of the clutch throw members 43 and actuate the clutch members A and A in a vice versa manner.

It is apparent that continuous reciprocating motion of the plunger rod by the elements involved subsists in a declutching and clutching cycle operating in alternating sequence.

We claim:

1. In a deep well pump, a casing, a reciprocal plunger rod, a rotary drive member in said casing arranged concentrically with said plunger rod, means of operative connection between said drive member and said rod operative to reciprocate said rod on rotation of said drive member, spring impelled means for changing the direction of rotation of said drive member during each stroke of said rod, spring4 pressed detents controlling said spring impelled means, and means on said rod At this position the n CII) for effecting positive actuation of said detents at predetermined points of travel of said rod to effect release of said spring impelled means.

2. In a deep well pump, a casing, a plunger rod,

y said clutch.

3. In a deep well pump, a casing, a reciprocal plunger rod, a rotary drive member in said casing arranged concentrically with said plunger rod, means of operative connection between said drive member and said rod operative to reciprocate said rod, drive member operating means in the lower end of said casing said means comprising respectively opposed spring impelled followers detent held, and means on the said plunger rod to at each end of the plunger rod stroke to successively compress the said spring and positively release the said detent and means imparting the resultant spring actuated movement of the said followers to the'said clutch. f

4. In a deep well pump, a casing, a rotary drive member in said casing, a plunger rod, means of operative connection between said drive member and said rod for reciprocating the latter, a pair of clutches embodied in said means, a reciprocal sleeve adapted to alternately operate said clutches, control rods connected to said sleeve extending downwardly in said casing, a pair of spaced lugs on said rods, a guide tube encircling said plunger rod, a pair of spaced followers slidably encircling said guide tube between said lugs, means on said followers arranged to engage said lugs, means positively engaging said followers to hold same against movement, means for positively actuating said last named means to release said followers, and springs arranged to actuate said followers on release thereof to advance said clutch control rods.

5. In a deep well pump, a casing, a rotary drive member in said casing, a plunger rod, means of operative connection between said drive member and said rod for reciprocating the latter, a pair of clutches embodied in said means, a reciprocal sleeve Y adapted to alternately operate said clutches, control rods connected to said sleeve and extending longitudinally of said casing, a pair of spaced lugs on said rods, a guide tube encircling said plunger rod, a pair of spaced followers slidably encircling said guide tube between said lugs, means on said followers arranged to engage said lugs, trip means positively engaging said followers to hold same against movement, means for positively actuating said trip means to release said followers, and springs arranged to actuate said followers on release thereof to advance said clutch control rods, said springs being arranged between said trip actuating means and said followers and adapted to be engaged and compressed by said trip actuating means.

6. In a deep well pump, a casing, a rotary drive member in said casing, a plunger rod, means of operative connection between said drive member and said rod for reciprocating the latter, a pair of clutches embodied in said means, a reciprocal sleeve adapted to alternately operate said clutches, control rods connected to said sleeve extending downwardly in said casingya pair of spaced lugs on said rods, a guide tube encircling said plunger rod, a pair of spaced followers, spring pressed detents having notches fofmed with parallel end walls engageable with said followers to positively hold the followers against movement, a trip ring carried by said piston rod arranged to positively engage and trip said detents out of engagement with said followers, and springs encircling said guide tube bearing against said followers and arranged to be placed under compression by advance of said trip ring to the detent releasing position.

l WILLIAM H. GRAHAM.

W. S. GRAU. 

